Re: Two options for IS on 300mm prime

"I have read two different opinion on turning IS off when on a tripod. ... Leave it on, or turn it off."

I am aware of what the manuals say but in my experience I can not tell the difference in leaving IS on or turning it off. Of course I use good heavy duty tripods and that may make the difference. As a rule I never turn IS off unless I have another specific reason. The best thing to do is try it for yourself but I leave it on.

Re: Two options for IS on 300mm prime

Page 8 of the manual says to turn it off for tripod use. The reason for the confusion is that newer IS systems can sense when they are on a tripod and turn themselves off.

Automatic disabling of the IS is also dependent on the camera body in use, too. The behavior is only found in certain combinations professional camera bodies and lenses, usually super telephoto lenses and EOS-1D bodies.